Steny Hamilton Hoyer (born June 14, 1939) is an American politician and attorney who has served as the U.S. representative for Maryland's 5th congressional district since 1981. He was also a House Majority Leader from 2007 to 2011 and again from 2019 to 2023. Hoyer first attained office through a special election on 19 May 1981. As of 2023, he is in his 22nd House term. His district includes a large swath of rural and suburban territory southeast of Washington, D.C. Hoyer is the dean of the Maryland congressional delegation and the most senior Democrat in the House.

From 2003 to 2023, Hoyer was the second-ranking Democrat in the House of Representatives behind Nancy Pelosi. He is a two-time House majority leader, having served in the post from 2007 to 2011 under Speaker Pelosi. During two periods of Republican House control (2003–2007 and 2011–2019), Hoyer served as House minority whip, both times under Minority Leader Pelosi. Following the 2018 midterm elections in which the Democrats took control of the House, Hoyer was reelected majority leader in 2019 for the 116th Congress; he remained the number two House Democrat behind Speaker Pelosi. He announced on November 17, 2022, that he, along with Pelosi, would not seek a leadership position in the 118th Congress, though he would remain a member of the House.